d7d9d426d72d2a994839ecba5e9a08a246c0b23d7a894804f070bd18ce513e65

General

Target

krisp-1.21.1-installer_pQow-O1.exe
Size

1.7MB
MD5

02aca2415c558b9d62d6d2c61f568f5d
SHA1

d2bb3e72371aee2d458bd2f147e56a9279e491e3
SHA256

d7d9d426d72d2a994839ecba5e9a08a246c0b23d7a894804f070bd18ce513e65
SHA512

5095f28f21a7b409d1ffb0a8e47ea741876c26436873d5ae3bb46ba6506b5f2baa866c0b3a8be61353ac3a472fe1d67bd93246509dd0c38040a0ab0ee6d7ce09
SSDEEP

24576:+7FUDowAyrTVE3U5FmxNfKzSYJMPaJPfrT90eKc4cgFLNPfs8duMpmsD:+BuZrEUeKzkwPH9RHgFLRdp/

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3056	krisp-1.21.1-installer_pQow-O1.tmp

Loads dropped DLL 2 IoCs

pid	Process
2692	krisp-1.21.1-installer_pQow-O1.exe
3056	krisp-1.21.1-installer_pQow-O1.tmp

Modifies system certificate store 2 TTPs 4 IoCs

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6\Blob = 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	krisp-1.21.1-installer_pQow-O1.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6\Blob = 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	krisp-1.21.1-installer_pQow-O1.tmp
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6	krisp-1.21.1-installer_pQow-O1.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6\Blob = 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	krisp-1.21.1-installer_pQow-O1.tmp

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29
PID 2692 wrote to memory of 3056	2692	krisp-1.21.1-installer_pQow-O1.exe	29

C:\Users\Admin\AppData\Local\Temp\krisp-1.21.1-installer_pQow-O1.exe
"C:\Users\Admin\AppData\Local\Temp\krisp-1.21.1-installer_pQow-O1.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Users\Admin\AppData\Local\Temp\is-371NM.tmp\krisp-1.21.1-installer_pQow-O1.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-371NM.tmp\krisp-1.21.1-installer_pQow-O1.tmp" /SL5="$60166,875199,832512,C:\Users\Admin\AppData\Local\Temp\krisp-1.21.1-installer_pQow-O1.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies system certificate store
  PID:3056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
774bb440452eeb57becc8982a9c40fcc

SHA1
d44d8907fe8a2c78bb255310dd5a3cbb2e89ad96

SHA256
63cd1f6e6d4bcc8288074c3a863d44802098d50601435f849b71a13529cf2ce3

SHA512
b86dcb87074c8089d575bec633b6972e4d68d3aaaac3883a422d24439c0c667c458210c394a4039035f121be1fd82abde0307cc4349ec3389795d03edf00e1d6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab397A.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar399C.tmp

Filesize
163KB

MD5
9441737383d21192400eca82fda910ec

SHA1
725e0d606a4fc9ba44aa8ffde65bed15e65367e4

SHA256
bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

SHA512
7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-371NM.tmp\krisp-1.21.1-installer_pQow-O1.tmp

Filesize
3.0MB

MD5
a13e891e7f1734de75ec6d3645b5604d

SHA1
3f39e07f548f9f056ba55f69cbc90bb75d0c0a05

SHA256
cbc9575ca8ebfbeaaf95bd21b2ac54956c460e975c4c9d71fee791accdedd94e

SHA512
2f74400c821d4f0f2d6386d05bfbb01da9abcd3a341a630c82a35ea976fea26ad62f1b83f27db760fd42dac1fae5dbaf2371b9e61c30e18a2e39f443b1cafdb1

Download Submit
\Users\Admin\AppData\Local\Temp\is-371NM.tmp\krisp-1.21.1-installer_pQow-O1.tmp

Filesize
3.0MB

MD5
a13e891e7f1734de75ec6d3645b5604d

SHA1
3f39e07f548f9f056ba55f69cbc90bb75d0c0a05

SHA256
cbc9575ca8ebfbeaaf95bd21b2ac54956c460e975c4c9d71fee791accdedd94e

SHA512
2f74400c821d4f0f2d6386d05bfbb01da9abcd3a341a630c82a35ea976fea26ad62f1b83f27db760fd42dac1fae5dbaf2371b9e61c30e18a2e39f443b1cafdb1

Download Submit
\Users\Admin\AppData\Local\Temp\is-NEGOH.tmp\botva2.dll

Filesize
37KB

MD5
67965a5957a61867d661f05ae1f4773e

SHA1
f14c0a4f154dc685bb7c65b2d804a02a0fb2360d

SHA256
450b9b0ba25bf068afbc2b23d252585a19e282939bf38326384ea9112dfd0105

SHA512
c6942818b9026dc5db2d62999d32cf99fe7289f79a28b8345af17acf9d13b2229a5e917a48ff1f6d59715bdbcb00c1625e0302abcfe10ca7e0475762e0a3f41b

Download Submit
memory/2692-121-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/2692-0-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/2692-136-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3056-7-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/3056-122-0x0000000000400000-0x000000000071B000-memory.dmp

Filesize
3.1MB

Download
memory/3056-123-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/3056-125-0x0000000000400000-0x000000000071B000-memory.dmp

Filesize
3.1MB

Download
memory/3056-127-0x0000000003AF0000-0x0000000003AFF000-memory.dmp

Filesize
60KB

Download
memory/3056-130-0x0000000000400000-0x000000000071B000-memory.dmp

Filesize
3.1MB

Download
memory/3056-131-0x0000000003AF0000-0x0000000003AFF000-memory.dmp

Filesize
60KB

Download
memory/3056-134-0x0000000000400000-0x000000000071B000-memory.dmp

Filesize
3.1MB

Download

Analysis

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